Deferred Shading Error: unable to load and see material in the level and material graph

Development Rendering
, , ,
1

Hi there! I’m having a problem with the material not showing in the level and the material graph. The project and materials work fine on other computers, and I believe the working ones are all Windows. It doesn’t work on this Macbook.
Here’s a picture showing the errors:

1379281121dbc4c6e30eca04f5d21fc
1379281121dbc4c6e30eca04f5d21fc1920×1109 191 KB

the error massages:
[SM5] /Engine/Private/DeferredShadingCommon.ush(431): error: Can’t open include file “/Engine/Generated/ShaderAutogen/AutogenShaderHeaders.ush”
include “/Engine/Generated/ShaderAutogen/AutogenShaderHeaders.ush”
from /Engine/Generated/Material.ush: 21: include “/Engine/Private/DeferredShadingCommon.ush”
from /Engine/Private/Lumen/LumenCardPixelShader.usf: 15: include “/Engine/Generated/Material.ush”